ul,li,body{
    padding: 0;
    margin: 0;
}
ul{
   list-style-type: none;
}
header h1{
    font-family: "微软雅黑";
    font-weight: normal;
    text-align: center;
    height: 49px;
    box-shadow:0px 2px 3px #000;
} 

.main .center-nav ul li.item{
   float: left;
   width: 20%;
   text-align: center;
}
.main .center-nav ul li.item img{
    margin-top: 5px;
    margin-bottom: 5px;
}
.urls-nav .urls{
    border-bottom: 1px solid #000;
}
.urls-nav .urls li.url{
    float: left;
    width: 20%;
    text-align: center;
    height: 45px;
    line-height: 45px;
}
.urls-nav .urls li.url a{
   color: black;
   text-decoration: none;
}
.urls-nav .urls li.url.sort a{
    color: #AAA;
}
.footer-nav{
    background: #333;
}
.footer-nav ul{
    width: 250px;
    margin: 0 auto;
}
.footer-nav ul li{
    float: left;
    height: 32px;
    width: 50px;
    text-align: center;
    line-height: 32px;
}

.footer-nav ul li a{
    color: white;
}
p{
    text-align: center;
}